Advisories » MGASA-2015-0151

Updated tor packages fix security vulnerabilities

Publication date: 15 Apr 2015
Modification date: 15 Apr 2015
Type: security
Affected Mageia releases : 4
CVE: CVE-2015-2928 , CVE-2015-2929

Description

"disgleirio" discovered that a malicious client could trigger an assertion
failure in a Tor instance providing a hidden service, thus rendering the
service inaccessible (CVE-2015-2928).

"DonnchaC" discovered that Tor clients would crash with an assertion failure
upon parsing specially crafted hidden service descriptors (CVE-2015-2929).

Introduction points would accept multiple INTRODUCE1 cells on one circuit,
making it inexpensive for an attacker to overload a hidden service with
introductions. Introduction points now no longer allow multiple cells of
that type on the same circuit.

The tor package has been updated to version 0.2.4.27, fixing these issues.
                

References

• https://bugs.mageia.org/show_bug.cgi?id=15639
• https://blog.torproject.org/blog/tor-02512-and-0267-are-released
• https://www.debian.org/security/2015/dsa-3216
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2928
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2929

SRPMS

4/core

• tor-0.2.4.27-1.mga4